Educated at Christ's Hospital,[1] Constantine joined the Royal Air Force as a cadet in 1926, and was posted to No.
[2] On 10 December 1928, Constantine's Siskin fighter aircraft crashed into the Thames Estuary off Leysdown, leaving him in a state of collapse.
He was rescued by Flying Officer Walter Anderson and Corporal Thomas McTeague, who were awarded the Empire Gallantry Medal,[3] exchanged for the George Cross in 1940.
[4] In 1934, as a flight lieutenant, Constantine took command of Number 3 Section of No.1 Armoured Car Company RAF.
[2] His final posts were as deputy chief of staff, plans & policy at Headquarters Supreme Headquarters Allied Powers Europe in 1956, air officer commanding-in-chief of Flying Training Command in 1959 and Commandant of the Imperial Defence College in 1961 before retiring in 1964.